[llvm-branch-commits] [llvm] [AMDGPU] Serialize WWM_REG vreg flag (PR #110229)
Akshat Oke via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Mon Oct 7 23:31:53 PDT 2024
https://github.com/Akshat-Oke updated https://github.com/llvm/llvm-project/pull/110229
>From 1cbc26fe2de38ae4e174aec128b39c899dab9136 Mon Sep 17 00:00:00 2001
From: Akshat Oke <Akshat.Oke at amd.com>
Date: Fri, 27 Sep 2024 08:58:39 +0000
Subject: [PATCH 1/4] [AMDGPU] Serialize WWM_REG vreg flag
---
llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp | 15 +++++++++++++++
llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h | 4 ++--
llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp | 11 +++++++++++
llvm/lib/Target/AMDGPU/SIRegisterInfo.h | 10 ++++++++++
llvm/test/CodeGen/AMDGPU/virtual-registers.mir | 16 ++++++++++++++++
5 files changed, 54 insertions(+), 2 deletions(-)
create mode 100644 llvm/test/CodeGen/AMDGPU/virtual-registers.mir
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index 1f2148c2922de9..28578a875c164c 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -1712,6 +1712,21 @@ bool GCNTargetMachine::parseMachineFunctionInfo(
MFI->reserveWWMRegister(ParsedReg);
}
+ auto setRegisterFlags = [&](const VRegInfo &Info) {
+ for (const auto &Flag : Info.Flags) {
+ MFI->setFlag(Info.VReg, Flag);
+ }
+ };
+
+ for (const auto &P : PFS.VRegInfosNamed) {
+ const VRegInfo &Info = *P.second;
+ setRegisterFlags(Info);
+ }
+ for (const auto &P : PFS.VRegInfos) {
+ const VRegInfo &Info = *P.second;
+ setRegisterFlags(Info);
+ }
+
auto parseAndCheckArgument = [&](const std::optional<yaml::SIArgument> &A,
const TargetRegisterClass &RC,
ArgDescriptor &Arg, unsigned UserSGPRs,
diff --git a/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h b/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
index 669f98dd865d61..e28c24bf8f8500 100644
--- a/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.h
@@ -693,8 +693,8 @@ class SIMachineFunctionInfo final : public AMDGPUMachineFunction,
void setFlag(Register Reg, uint8_t Flag) {
assert(Reg.isVirtual());
- if (VRegFlags.inBounds(Reg))
- VRegFlags[Reg] |= Flag;
+ VRegFlags.grow(Reg);
+ VRegFlags[Reg] |= Flag;
}
bool checkFlag(Register Reg, uint8_t Flag) const {
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
index 9e1c4941dba283..84569b3f11df67 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -3839,3 +3839,14 @@ SIRegisterInfo::getSubRegAlignmentNumBits(const TargetRegisterClass *RC,
}
return 0;
}
+
+SmallVector<std::string>
+SIRegisterInfo::getVRegFlagsOfReg(Register Reg,
+ const MachineFunction &MF) const {
+ SmallVector<std::string> RegFlags;
+ const SIMachineFunctionInfo *FuncInfo = MF.getInfo<SIMachineFunctionInfo>();
+ if (FuncInfo->checkFlag(Reg, AMDGPU::VirtRegFlag::WWM_REG)) {
+ RegFlags.push_back("WWM_REG");
+ }
+ return RegFlags;
+}
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
index 409e5418abc8ec..2c3707e119178a 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
@@ -454,6 +454,16 @@ class SIRegisterInfo final : public AMDGPUGenRegisterInfo {
// No check if the subreg is supported by the current RC is made.
unsigned getSubRegAlignmentNumBits(const TargetRegisterClass *RC,
unsigned SubReg) const;
+
+ std::pair<bool, uint8_t> getVRegFlagValue(StringRef Name) const override {
+ if (Name == "WWM_REG") {
+ return {true, AMDGPU::VirtRegFlag::WWM_REG};
+ }
+ return {false, 0};
+ }
+
+ SmallVector<std::string>
+ getVRegFlagsOfReg(Register Reg, const MachineFunction &MF) const override;
};
namespace AMDGPU {
diff --git a/llvm/test/CodeGen/AMDGPU/virtual-registers.mir b/llvm/test/CodeGen/AMDGPU/virtual-registers.mir
new file mode 100644
index 00000000000000..3ea8f6eafcf10c
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/virtual-registers.mir
@@ -0,0 +1,16 @@
+# RUN: llc -mtriple=amdgcn -run-pass=none -o - %s | FileCheck %s
+# This test ensures that the MIR parser parses virtual register flags correctly
+
+---
+name: vregs
+# CHECK: registers:
+# CHECK-NEXT: - { id: 0, class: vgpr_32, preferred-register: '$vgpr1', flags: [ WWM_REG ] }
+# CHECK-NEXT: - { id: 1, class: sgpr_64, preferred-register: '$sgpr0_sgpr1', flags: [ ] }
+# CHECK-NEXT: - { id: 2, class: sgpr_64, preferred-register: '', flags: [ ] }
+registers:
+ - { id: 0, class: vgpr_32, preferred-register: $vgpr1, flags: [ WWM_REG ]}
+ - { id: 1, class: sgpr_64, preferred-register: $sgpr0_sgpr1 }
+body: |
+ bb.0:
+ %2:sgpr_64 = COPY %1
+ %1:sgpr_64 = COPY %0
>From 4c26b4f3b1ad8952767625ba949eaa750aec0652 Mon Sep 17 00:00:00 2001
From: Akshat Oke <Akshat.Oke at amd.com>
Date: Fri, 4 Oct 2024 06:31:06 +0000
Subject: [PATCH 2/4] Correct TRI methods to optional<> and SmallString
---
llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp | 6 +++---
llvm/lib/Target/AMDGPU/SIRegisterInfo.h | 8 ++++----
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
index 84569b3f11df67..af1b736714b738 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -3840,13 +3840,13 @@ SIRegisterInfo::getSubRegAlignmentNumBits(const TargetRegisterClass *RC,
return 0;
}
-SmallVector<std::string>
+SmallVector<SmallString<8>>
SIRegisterInfo::getVRegFlagsOfReg(Register Reg,
const MachineFunction &MF) const {
- SmallVector<std::string> RegFlags;
+ SmallVector<SmallString<8>> RegFlags;
const SIMachineFunctionInfo *FuncInfo = MF.getInfo<SIMachineFunctionInfo>();
if (FuncInfo->checkFlag(Reg, AMDGPU::VirtRegFlag::WWM_REG)) {
- RegFlags.push_back("WWM_REG");
+ RegFlags.push_back(SmallString<8>("WWM_REG"));
}
return RegFlags;
}
diff --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
index 2c3707e119178a..6ea60dc53685bb 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.h
@@ -455,14 +455,14 @@ class SIRegisterInfo final : public AMDGPUGenRegisterInfo {
unsigned getSubRegAlignmentNumBits(const TargetRegisterClass *RC,
unsigned SubReg) const;
- std::pair<bool, uint8_t> getVRegFlagValue(StringRef Name) const override {
+ std::optional<uint8_t> getVRegFlagValue(StringRef Name) const override {
if (Name == "WWM_REG") {
- return {true, AMDGPU::VirtRegFlag::WWM_REG};
+ return AMDGPU::VirtRegFlag::WWM_REG;
}
- return {false, 0};
+ return {};
}
- SmallVector<std::string>
+ SmallVector<SmallString<8>>
getVRegFlagsOfReg(Register Reg, const MachineFunction &MF) const override;
};
>From dea012aacc9f771e2ada19c910d6f40d3ff8a03e Mon Sep 17 00:00:00 2001
From: Akshat Oke <Akshat.Oke at amd.com>
Date: Fri, 4 Oct 2024 06:31:42 +0000
Subject: [PATCH 3/4] Move test to MIR/AMDGPU/mfi-no-ir
---
llvm/test/CodeGen/AMDGPU/virtual-registers.mir | 16 ----------------
.../MIR/AMDGPU/machine-function-info-no-ir.mir | 15 +++++++++++++++
2 files changed, 15 insertions(+), 16 deletions(-)
delete mode 100644 llvm/test/CodeGen/AMDGPU/virtual-registers.mir
diff --git a/llvm/test/CodeGen/AMDGPU/virtual-registers.mir b/llvm/test/CodeGen/AMDGPU/virtual-registers.mir
deleted file mode 100644
index 3ea8f6eafcf10c..00000000000000
--- a/llvm/test/CodeGen/AMDGPU/virtual-registers.mir
+++ /dev/null
@@ -1,16 +0,0 @@
-# RUN: llc -mtriple=amdgcn -run-pass=none -o - %s | FileCheck %s
-# This test ensures that the MIR parser parses virtual register flags correctly
-
----
-name: vregs
-# CHECK: registers:
-# CHECK-NEXT: - { id: 0, class: vgpr_32, preferred-register: '$vgpr1', flags: [ WWM_REG ] }
-# CHECK-NEXT: - { id: 1, class: sgpr_64, preferred-register: '$sgpr0_sgpr1', flags: [ ] }
-# CHECK-NEXT: - { id: 2, class: sgpr_64, preferred-register: '', flags: [ ] }
-registers:
- - { id: 0, class: vgpr_32, preferred-register: $vgpr1, flags: [ WWM_REG ]}
- - { id: 1, class: sgpr_64, preferred-register: $sgpr0_sgpr1 }
-body: |
- bb.0:
- %2:sgpr_64 = COPY %1
- %1:sgpr_64 = COPY %0
diff --git a/llvm/test/CodeGen/MIR/AMDGPU/machine-function-info-no-ir.mir b/llvm/test/CodeGen/MIR/AMDGPU/machine-function-info-no-ir.mir
index ebbb89b7816c58..51795a4fea515e 100644
--- a/llvm/test/CodeGen/MIR/AMDGPU/machine-function-info-no-ir.mir
+++ b/llvm/test/CodeGen/MIR/AMDGPU/machine-function-info-no-ir.mir
@@ -578,3 +578,18 @@ body: |
SI_RETURN
...
+---
+name: vregs
+# FULL: registers:
+# FULL-NEXT: - { id: 0, class: vgpr_32, preferred-register: '$vgpr1', flags: [ WWM_REG ] }
+# FULL-NEXT: - { id: 1, class: sgpr_64, preferred-register: '$sgpr0_sgpr1', flags: [ ] }
+# FULL-NEXT: - { id: 2, class: sgpr_64, preferred-register: '', flags: [ ] }
+registers:
+ - { id: 0, class: vgpr_32, preferred-register: $vgpr1, flags: [ WWM_REG ]}
+ - { id: 1, class: sgpr_64, preferred-register: $sgpr0_sgpr1 }
+ - { id: 2, class: sgpr_64, flags: [ ] }
+body: |
+ bb.0:
+ %2:sgpr_64 = COPY %1
+ %1:sgpr_64 = COPY %0
+...
>From 6651bfaeb6ed2a579b8d140b1664f011625f8819 Mon Sep 17 00:00:00 2001
From: Akshat Oke <Akshat.Oke at amd.com>
Date: Tue, 8 Oct 2024 06:24:11 +0000
Subject: [PATCH 4/4] AS
---
llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index 28578a875c164c..41621517706bb5 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -1713,18 +1713,16 @@ bool GCNTargetMachine::parseMachineFunctionInfo(
}
auto setRegisterFlags = [&](const VRegInfo &Info) {
- for (const auto &Flag : Info.Flags) {
+ for (uint8_t Flag : Info.Flags) {
MFI->setFlag(Info.VReg, Flag);
}
};
- for (const auto &P : PFS.VRegInfosNamed) {
- const VRegInfo &Info = *P.second;
- setRegisterFlags(Info);
+ for (const auto &[_, Info] : PFS.VRegInfosNamed) {
+ setRegisterFlags(*Info);
}
- for (const auto &P : PFS.VRegInfos) {
- const VRegInfo &Info = *P.second;
- setRegisterFlags(Info);
+ for (const auto &[_, Info] : PFS.VRegInfos) {
+ setRegisterFlags(*Info);
}
auto parseAndCheckArgument = [&](const std::optional<yaml::SIArgument> &A,
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